{"id":20074913,"date":"2018-03-21T19:54:00","date_gmt":"2018-03-21T14:24:00","guid":{"rendered":"https:\/\/www.thethirdpole.net\/?p=74913"},"modified":"2021-06-22T20:08:35","modified_gmt":"2021-06-22T14:38:35","slug":"protecting-pichavaram-mangroves-in-coastal-tamil-nadu","status":"publish","type":"post","link":"https:\/\/dialogue.earth\/en\/nature\/protecting-pichavaram-mangroves-in-coastal-tamil-nadu\/","title":{"rendered":"Protecting Pichavaram mangroves in coastal Tamil Nadu"},"content":{"rendered":"\n<p>The 2004 Indian Ocean tsunami, which buffeted the east coast of India and caused extensive damage to Nagapattinam in Tamil Nadu, left the neighbouring area of Pichavaram, covered in a dense mangrove forest, relatively unharmed. It was one of the landmark events that brought attention to the fact that mangroves act as a bio-shield during natural disasters and aid in adaptation to climate change.<\/p>\n\n\n\n<p>\u201cThe tsunami was a wake-up call,\u201d A. Saleem Khan of the Centre for Climate Change and Adaptation Research (<a href=\"http:\/\/web.archive.org\/web\/20210125033413\/https:\/\/www.annauniv.edu\/CCAR\/index.html\">CCCAR<\/a>) in Anna University told <a href=\"http:\/\/web.archive.org\/web\/20210125033413\/https:\/\/indiaclimatedialogue.net\/2018\/03\/21\/protecting-pichavaram-mangroves-coastal-tamil-nadu\/indiaclimatedialogue.net\">indiaclimatedialogue.net<\/a>. \u201cNagapattinam, one of the most affected areas, was a few kilometres away from Pichavaram. However, Pichavaram was not heavily affected. Many scientists concluded that these mangroves were a bio-shield to the ecosystem during a coastal disaster like tsunami.\u201d<\/p>\n\n\n\n<p>Pichavaram, the vast expanse of mangrove forests near Chidambaram in Cuddalore district of Tamil Nadu, is located between two estuaries, Vellar estuary in the north and Coleroon estuary in the south. Pichavaram mangroves have been under the threat of rising sea levels (SLR) through sediment erosion, inundation stress and increased salinity in the land areas. These problems will be exacerbated for mangroves that are subjected to coastal squeeze \u2014 where migration of these mangroves towards land is restricted by topography or human developments.<\/p>\n\n\n\n<p>Coastal managers, adaptation planners, and policymakers face major challenges to frame suitable coastal adaptation strategies to SLR without reliable, scientific information. Adaptation is considered one of the most appropriate response strategies to address the challenges of SLR at a local level, particularly to conserve major coastal resources.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-need-for-local-data\">Need for local data<\/h2>\n\n\n\n<p>Due to lack of climate data in the coastal areas, there is not enough understanding of the impact of the changing climate on coastal ecosystems. This is making it difficult to frame climate-based adaptation strategies and policies locally.<\/p>\n\n\n\n<p>Such comprehensive information is rarely available, and seldom lies in the hands of decision makers responsible for the management of the coastal zone. Though there is an understanding of SLR trends, there is uncertainty around its rate and timing. Coastal managers, adaptation planners and policymakers may need scientific information on local sea rise levels such as&nbsp; how much the level will rise and when it is predicted to rise.<\/p>\n\n\n\n<p>However, adaptation measures can offset anticipated mangrove losses and improve resistance and resilience to climate change. Coastal planning, specifically, can be adapted to facilitate mangrove migration with rising sea levels.<\/p>\n\n\n\n<p>A first step towards planning adaptation policies of SLR would be the projection at the local level of different time scales and different scenarios, as devised by the Intergovernmental Panel on Climate Change (<a href=\"http:\/\/web.archive.org\/web\/20210125033413\/http:\/\/www.ipcc.ch\/\">IPCC<\/a>). When future projections are modelled, it could create a crucial input in devising adaptation planning and implementation.<\/p>\n\n\n\n<div class=\"wp-block-cd-article-image aligncenter block--article-image\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><div class=\"block--article-image__column\"><div class=\"block--article-image__image\"><img class=\"lazy\" data-src=\"https:\/\/dialogue.earth\/content\/uploads\/2021\/06\/Pichavaram01.jpg\" data-srcset=\"https:\/\/dialogue.earth\/content\/uploads\/2021\/06\/Pichavaram01.jpg 680w\" data-sizes=\"(max-width: 600px) 768px, (max-width: 1024px) 1024px, 680px\" alt=\" Pichavaram coastal communities\"\/><\/div><div class=\"block--article-image__content\"><div itemprop=\"caption\" class=\"block--article-image__caption\">Coastal communities around Pichavaram depend on the mangrove forest for their livelihoods. (Photo by Sharada Balasubramanian)<\/div><\/div><\/div><meta itemprop=\"contentUrl\" content=\"https:\/\/dialogue.earth\/content\/uploads\/2021\/06\/Pichavaram01.jpg\"\/><meta itemprop=\"contentSize\" content=\"127 KB\"\/><meta itemprop=\"height\" content=\"390\"\/><meta itemprop=\"width\" content=\"680\"\/><meta itemprop=\"author\"\/><meta itemprop=\"representativeOfPage\" content=\"true\"\/><\/div>\n\n\n\n<p>\u201cThe science behind this is mean sea level, which is an average of high and low tides. It is a benchmark from IPCC. This may differ from Chennai to Kanyakumari,\u201d Khan told <a href=\"http:\/\/web.archive.org\/web\/20210125033413\/https:\/\/indiaclimatedialogue.net\/2018\/03\/21\/protecting-pichavaram-mangroves-coastal-tamil-nadu\/indiaclimatedialogue.net\">indiaclimatedialogue.net<\/a>. \u201cFor analysing the trend of sea level, we need a minimum of 30 years data. Only then is it called climate information.\u201d<\/p>\n\n\n\n<p>The climate variables are collected and put in a repository. The global data is then projected. Khan says, \u201cSince we need local and regional information, we downscale the global data to local area information through the grid method, using climate modelling.\u201d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-projections-on-pichavaram-mangroves\">Projections on Pichavaram mangroves<\/h2>\n\n\n\n<p>The vulnerability of coastal areas to inundation of the Vellar-Coleroon estuarine region of the Tamil Nadu coastline was calculated on the projected SLR scenarios of 0.5 m and 1 m. According to Khan\u2019s paper, <a href=\"http:\/\/web.archive.org\/web\/20210125033413\/https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0964569112002207\">Predicted Impact of the Sea-Level Rise at Vellar-Coleroon Estuarine Region of Tamil Nadu Coast in India: Mainstreaming Adaptation as a Coastal Zone Management<\/a>, out of the total study area of 6,541 hectare (ha) , about 1,570 ha will be inundated to 0.5 m SLR, and at 1 m SLR, about 2,407 ha will be inundated. Dense mangrove area of about 265 ha and 373 ha will be under severe threat of inundation to 0.5 m and 1 m SLR.<\/p>\n\n\n\n<p>Three major coastal natural resources \u2013 agriculture, mangroves and aquaculture farms \u2013 and the dependent communities are at a high risk of inundation due to rising sea level, the study confirmed.<\/p>\n\n\n\n<p>Khan says, \u201cThe coastal areas are undulated. The mangroves, which are on low elevation, will submerge. The data indicates which pockets will submerge. The depths of those areas were marked into highly vulnerable, medium vulnerable and low vulnerable.\u201d<\/p>\n\n\n\n<p>He adds, \u201cOne third of the land may go under water, and we have given these predictions for 2050 and 2100 under a moderate or balanced scenario as defined by IPCC. This is assuming that everything goes in the same speed.\u201d If there is change in population or industrial development, these numbers could go higher or lower.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-adaptation-and-policymaking\">Adaptation and policymaking<\/h2>\n\n\n\n<p>Khan, in his research paper, <a href=\"http:\/\/web.archive.org\/web\/20210125033413\/http:\/\/nopr.niscair.res.in\/handle\/123456789\/35055\">Climate Change Induced Sea Level Projections for the Pichavaram Mangrove Region of the Tamilnadu Coast, India: A Way Forward for Framing Time-Based Adaptation Strategies<\/a>, looks at how this information can help coastal managers and adaptation planners to frame location-specific and time-based mangrove adaptation strategies to SLR.<\/p>\n\n\n\n<p>The paper suggests that long-term strategic adaptation plans for the full range of possible SLR need to be widely developed. However, the constraints on approaches to adaptation due to broader policy and development goals should be carefully considered.<\/p>\n\n\n\n<p>The recommendation on adaptation strategies from Khan\u2019s study was included in the SLR chapter of the State Action Plan on Climate Change of Tamil Nadu. \u201cWe have a number of policies on coastal areas, and we need to have a mainstreaming approach to existing policies,\u201d Khan told <a href=\"http:\/\/web.archive.org\/web\/20210125033413\/https:\/\/indiaclimatedialogue.net\/2018\/03\/21\/protecting-pichavaram-mangroves-coastal-tamil-nadu\/indiaclimatedialogue.net\">indiaclimatedialogue.net<\/a>. \u201cThis falls in line, and works in parallel with the development plan of Tamil Nadu.\u201d<\/p>\n\n\n\n<p>To protect the mangroves from SLR, Khan recommends landward migration. This concept emphasises increasing mangroves on the land rather than the seaward side. This is one of adaptation strategies that have been widely used in Tamil Nadu.<\/p>\n\n\n\n<p>\u201cWe need to increase the thickness of the mangroves towards the land side,\u201d Khan said. \u201cThis activity is being done by the forest department and MS Swaminathan Research Foundation (<a href=\"http:\/\/web.archive.org\/web\/20210125033413\/http:\/\/www.mssrf.org\/\">MSSRF<\/a>) for restoration of Pichavaram mangroves, much in tune with the government of India\u2019s effort to protect them.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A systematic and long-term collection of local data is expected to aid adaptation to sea level rise in the Pichavaram mangrove forest on India\u2019s east coast that will also help in conserving and expanding it<\/p>\n","protected":false},"author":3733,"featured_media":20074914,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[764],"tags":[537,40027778,608],"hashtags":[],"country":[20000111],"class_list":["post-20074913","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nature","tag-ecosystems","tag-marine-protection","tag-wetlands","country-india"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.0 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Protecting Pichavaram mangroves in coastal Tamil Nadu | Dialogue Earth<\/title>\n<meta name=\"description\" content=\"Local data is expected to aid adaptation to sea level rise in the Pichavaram mangrove forest on India\u2019s east coast.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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